Sewing-machine.



Patented Jan. 25, 1916.

IN VE/V TOR H/S A TTOR/VEY THE COLUMBIA PLANOORAPH co., WASHINGTON,

CHARLES LURZ, OF NEW YORK, N. Y.

SEWING-MACHINE.

Specification of Letters Patent.

Patented Jan. 25, ieie.

Application filed August 6, 1915. Serial No. 43,957.

To all whom it may concern:

' Be it known that I, CHARLES LURZ, a citizen of the United States, and resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Sewing- Mfachines, of which the following is a specification.

My invention relates to that class of sewing machines, such as straw hat sewing machines, having a tubular work support or arm to permit of the convenient manipulation of the work relatively to the stitching mechanism during the sewing operation. In this class of machines it is customary to locate a guard in front of the sewing ma chine hook or looper to prevent the work being accidentally caught or damaged thereby. These guards usually comprise a plate mounted on the front end of the work support in a manner to be capable of movement to and from closing or guarding position whereby access to the looper may be had when desired. These guards, as heretofore made in many instances, have been so constructed and positioned as to form an objectionable protuberance at the front end of the work support which interferes to a greater or less extent with the manipulation of certain kinds of work and particularly in preventing the work being brought as close to the needle as desired.

It has therefore been the main object of my invention to provide an improved guard that will not present any protuberance be yond the front end of the work support or arm and at the same time will be capable of ready and convenient operation in being adjusted to and from its closing or guarding position in front of the sewing machine looper. This object I attain by means of the novel construction and combination of parts hereinafter set forth in detail and pointed out in the appended claims.

Referring now to the drawings forming part of the specification, Figure l is a front elevation of a sewing machine provided with a looper guard embodying my invention. Fig. 2 is a front end elevation of the sewing machine work support and contained parts separate from the machine proper, showing the looper guard at the front end of the work support partly broken away and also indicating by dotted lines the open position of said looper guard. Fig. 3 is a longitudinal section through the work support, taken on the line 33 of Fig. 2, showing the looper guard and its operating means as carried by the work support.

Similar reference characters" indicate like parts in the several figures of the drawings.

My invention may be machines of any suitable type, the machine here shown being a chain stitch machine of usual construction and operation and comprising a vertically reciprocating needle 2 and a cooperative rotary looper 3. The work support or arm of this machine, indicated at 4, is of tubular form for the convenient manipulation of the work and is arranged with its front end projecting slightly forward of the looper 3. Remova'bly seated within this work support in a position in front of the looper is my improved guard, indicated at 5. This guard, in the present instance, is in the form of a disk to conform to the cylindrical shaped work support and is adapted to be seated when in normal closing position against a pair of stop pins 6, 6, on the inner wall of the work support, with its front face sul stantially flush with the end of said work support as shown.

As before indicated, it is desirable that the guard for the looper should present a smooth and unobstructed surface at the front end of the work support so as not to interfere in any way with the manipulation of the work at such point. I have therefore provided a means for operating the guard, z. a, for moving the same to and from its closing position opposite the looper, which is arranged and operates at the rear side of the guard. This means, as here shown, comprises an operating rod 7 mounted in bearings 8, 8 on the inner wall of the work support, with one end of which the guard plate is eccentrically connected at 9, and the other end of which projects rearwardly of the work support to provide an operating han die; the same preferably being provided with a knurled head 10. To shift the guard from its closing or guarding position opposite the looper as shown in Fig. 2, to an open position exposing the looper as indicated by dotted lines in Fig. 2, the operator grasps the rear end 10 of the rod 7 and pushes the same longitudinally forward in its bearings until the guard is moved out of the tubular work support, after which the rod is turned to swing the guard laterally to an open position as indicated.

applied to sewing The guard may be held in closed position by any suitable means. In the-present case, it is held in such position by means of a coiled spring 11 interposed between the head 10 on the rod and the adjacent bearing 8, as clearly shown in Fig. 3.

lVhat I claim is 1. In combination with a sewing machine having a tubular work support arranged with its front end projecting forward of the sewing machine looper, and a guard plate for closing the front end of the work support, said guard plate having an eccentrically attached rod supported to have longitudinal and turning movements for moving the guard plate to and from its closing position.

2. In combination with a sewing machine having a tubular work support arranged with its front end projecting forward of the sewing machine looper, and a guard plate for closing the front end of the work support and being removably seated therein when in closing position, said guard plate having an eccentrically attached rod supported to have longitudinal and turning movements for moving the guard plate to and from its closing position.

3. In combination with a sewing machine having a tubular work support arranged with its front end projecting forward of the sewing machine looper, a guard plate for closing the front end of the work support and being removably seated therein when in closing position, said guard plate having an eccentrically attached rod supported to have longitudinal and turning movements for moving the guard plate to and from its clos ing position, and a spring for holding the guard plate in its closed position.

4:. In combination with a sewing machine having a tubular work support arranged with its front end projecting forward of the Copies of this patent may be obtained for five cents each, by addressing the sewing machine looper, closing the front end of the work support and being removably seated therein when in closing position, said guard plate having an eccentrically attached rod supported in bearings on the work support to have longitudinal and turning movements for moving the guard plate to and from its closing position.

5. In combination with a sewing machine having a tubular work support arranged with its front end projecting forward of the sewing machine looper, a guard plate for closing the front end of the work support and being removably seated therein when in closing position, said guard plate having an eccentrically attached rod supported in bearings on the inner wall of the work sup port for longitudinal and turning movement in moving the guard plate to and from its closing position and at its rear end extending rearwardly of the work support to provide an operating handle.

6. In combination with a sewing machine having a tubular work support arranged with its front end projecting forward of the sewing machine looper, a guard plate for closing the front end of the work support and being removably seated therein when in closing position, said guard plate having an eccentrically attached rod supported to have longitudinal and turning movements for moving the guard plate to and from its closing position, a stop against which the guard plate seats when in closing position, and a spring holding the guard plate against said stop.

Signed at New York, in the county of New York, and State of New York, this 22nd day of July, A. D. 1915.

CHARLES LURZ.

Witnesses:

CHAS. F. DANE, C. J. BUTLER.

Commissioner of Patents,

Washington, D. 0.

a guard plate for 

